Sparking plug.



I. KOUTKINE.

SPARKING PLUG.

APPLIOATION 171L111) MAY 8, 1912.

fPatented, Aug. 12 1913 IWANE KOUTKINE, OF ST. PETERS IBURG, RUSSIA.

SPARKING PLUG.

Specification of Letters Patent.

Patented Aug. 12,1913.

Application filed May 8, 1912. Serial No. 695,988.

To all whomz't may concern Be it known that I, IWANE KOUTKINE, student, a subject of the Czar of Russia, residing at 31 Foutanka, St. Petersburg, Russia, have invented certain new and useful Improvements in Sparking Plugs,of which the followingis a specification.

The present invention relates to a sparking plug for internal combustion engines, and hastor its object to provide a plug in which those portions most liable to wear and to clogging by impurities can be easily and quickly removed and replaced, repaired or cleaned.

Another object of the present invention is to improve its construction so as to insure the reliability of its operation.

The invention is illustrated by way of example, in the accompanying drawings in which Figure 1 is an elevation of the improved sparking plug, Fig. 2 is a plan thereof and Fig. 3 a section on the line A-B of Fig. 2 while Fig. 4 is a section on the line CD of Fig. 3. Fig. 5 is an elevation showing the improved arrangement of sparkingpoints, while Fig. 6 and Fig. 7 are sections respectively on the lines AB and CD of Fig. 5. i

In accordance with the present invention the sparkling plug consists of a casing 1 adapted to be screwed into the cylinder wall and which is provided with a conical passage 2. In this passage is arranged an insulatingbody 3 also of conical torm and which is spaced from the casing by a packing 4:.

The body 3 has an extension 5 on which rests a bayonet ring 6.- This ring is provided with two or more screw-threaded pins 8 horizontally arranged as shown in Fig. 3. On these pins are provided wing nuts 9 and collars 11 of suitable form. The pins 8 are arranged in spiral slots 12 in the casing 1 which slots are connected with the vertical slots 13. The pins 8 are introduced by way of the latter are fed forward by rotation of the bayonet ring and are secured by means of the nuts 9. By rotation of the bayonet ring 6 the member 3 is forced tightly into the opening 2. A conductor 14 passes through the body 3 and terminates in the sparking points 15. To the upper end 16 is secured the plug for connecting the spark mg plug with the source of current. If the sparkingpoints 15 are to' be renewed or cleaned and for this purpose the body 3 is to be removed from the casing 1 it is merely necessary to unscrew. the nuts 9 and toturn the bayonet ring 6 until the pins 8 come against the slots 13. The ring 6 can then be removed and thereupon the body 3 can also be removed. 1

In order to improve the'construction described above as to the reliability of its operation the sparking-plug can be provided with the improved arrangement of'sparking points, substantially as described below and illustrated on Fig. 5, 6, 7 in the accompanymg drawings.

Sparkino plugs provided with more than one sparking point or, as it is often the case in many ct'lnstru'ctions. provided with the starlike arrangementof sparking-gaps ordinarily become clogged by impurities after some time, so that no sparks can be produced.

The present invention has for its object to obviate this inconvenience. For that purpose the conductor a (Fig. 5) terminates in the four cornered or polyhedral pin 1) provided with sharp edges passing through the corresponding circular opening 0 in the bottom d of the casing f. In this manner sparkinggaps are formed between the edges of the conductor a and toe circumference of the opening 0. Beside these sparking-gaps another set of such sparking-gaps is formed in accordance with'th'e present invention between the edges of the four cornered or polyhedral collar g and the internal surface of the casing f. These latter sparking gaps are arranged inside the said casing 1'', so that they. can by no 'way become dirt-y. The spark therefore mustbe in any case produced at 9, even if the external set of sparkinggaps is becoming dirty and out of operation. The gas inside the plugbeing inflained, it comes 'to movement with great velocity so that the sparking gaps at Z) are blown through with force sufficient to make them clean from dirt. The sparking-gaps at 9 act therefore in a certain manner as emergency gaps. They must be for some extent greater than the sparking gaps at I), but. in any case 'must correspond to the given electrical tension.

Having now particularly described and usvorta'mod the nature of my said invent-ion engage the bayonet slots tobind Said body 10 and 111 what manner the same is to be perwlthnl sand caslng; and nuts run upon sald formed I declare that what I claim is: pins for locking the same in the Slots.

in n spark plug, a casing having bayonet In testimony whereof I affix my signature slots therein: a shouldered body carrying a in presence of two Witnesses. colnht'l'rtotrenu'n'ubly fitted in said casing; a IVANE KOUTIUNE. ring l'm'oluhly encircling said body and Vitnesses: adapted to netnpon the shoulder; threaded MOSES LUISARENNO,

pins projecting from said ring adapted. to N. D. FoMIN. 

